Ring with opening leather goods 4cm

Price for a ring:

Outer Diameter: 37 mm, 3.7 cm;
Inner Diameter: 26 mm, 2.6 cm.
Thickness: 8 mm.
Weight: 22 g per piece,

Thick round metal ring with sharp edges, heavy and luxurious quality, opens with a lever, to pass through another ring or as a closure.
To pass the strap of the bag.